Window ventilator for double hung sash



- April 6, 1937.

H. M. GEBHARDT WINDOW VENTILATOR FOR DOUBLE HUNG SASH Filed Nov. 4, 1955Patented Apr. 6, 1937 UNITED STATES PATENT OFFICE Henry M. Gebhardt,Chicago, Ill.

Application November 4, 1935, Serial No. 48,172

6 Claims.

The invention relates to improvements in a window ventilator for doublehung sash over various types heretofore in use, some of which arepatented, but the patents evidently are for the type of frame used, andthe objects of the improvements are: first, to provide a ventilatorwhich can be of service at times when it is most needed, that is duringrainy, snowy or sleeting weather. Due to the construction of my venti-10 lator, the rain or drip of melting snow or sleet is deposited on thesame outside window sill on which it is deposited when a window isclosed; second, it will not rattle or make a disturbing noise duringwindy weather.

This invention is accompanied by a drawing on which Figure 1 is avertical view as one would see it from the outside of the window andshows the vertical portion, the vertical view of the sloping portion,the lower vertical part which when in place in a window frame is betweenthe inner window sill and the sash when the window is.

closed, the two end wings on each of which are shown two notches cut inthe outer edges at 15 degrees and bent out at 15 degrees, thus providingtwo saw teeth, which when the ventilator is placed in a window frame,the extreme ends of the wings fit between the sash and the sash stop.The saw teeth provide an anchor in the sides of the window frame. Figure2 is a top view of Figure 1 and shows the top stiffener flanges alongthe top of the vertical portion, and the two brackets, a horizontal viewof the sloping portion which is shown to be cut at an angle at each end.This is to provide for tension in the brackets. Figure 3 is a verticalcross section'looking toward the left end and shows the end bracket. Thedotted line shown parallel to the sloping bottom is the edge of thesloping bottom bent to stiffen the bottom and to provide for a weatherstop.

Part I is the main part which forms the ventilator and is made of onepiece of sheet metal. Part 2 is a flat spring to obtain a certaintension on each of the two end brackets. Part 3 is a rivet of sufficientstrength to support springs 45 No. 2.

Part I can also be made twopiece by overlapping one another. It can beadjusted in length to fit a certain window and be bolted together,

the holes for the bolts being provided by partly a and not completelypunching through the metal at such intervals so that certain of thesepunchings can be easily pushed out to provide the holes for the bolts.

- This specification is also accompanied by a 00 drawing which shows theventilator in place in a window frame to show clearly how it is intendedto be used, as this may not be easily understood by means of words only.From this drawing it will be noted that the vertical flange at thebottom and the two end wings fit against the outside of the sash stopsand the inner sill allowing the sash to slide by and to be completelyclosed if so desired.

I am aware that prior to my invention window ventilators of varioustypes were made. I therefore do not claim a combination of such but Iclaim:

1. A window ventilator formed of a sheet of metal blank, folded to forma vertical front wall and side walls inturned therefrom, a bottom wallfolded along the lower edge of the front wall with its ends underlyingthe side walls, the free ends of said side and bottom walls being foldedoutwardly to form a substantially flat and narrow surface on three edgesof the ventilator, the two ends of said bottom wall being upturned andconverging toward the front wall forming means for limiting the outwardpositioning of the side walls while permitting of their inward movement.

2. A-window ventilator formed of a sheet metal blank folded to form avertical front wall and side walls I inturned therefrom, a bottom wallfolded along the lower edge of the front wall with its ends upturned andin juxtaposition with the side walls, the free vertical ends of the sidewalls and the adjoining end of the bottom wall being formed to provide aflat and narrow continuous surface along one open end of the ventilator,the upturned ends of the bottom wall being outwardly of the side wallsfor limiting the outward positioning of said side walls while permittingof their free inward movement.

3. The combination of claim 2 hereof in which the upturned ends of thebottom wall are in spaced relation with the side walls permitting ofadjustment of said side walls with respect to the bottom and frontwalls.

4. The combination of claim 2 hereof in which there are spring meanscoacting with the front and side walls urging said side walls inengagement with the upturned portions of the bottom wall.

5. The combination of claim 2 hereof in which the lower edges of theside walls are inclined to determine the inclination of the bottom wallwhen folded.

6. The combination of claim 2 hereof in which the top edges of the frontand side walls are folded to form a relatively flat top surface on theventilator.

HENRY M. GEBHARDT.

CERTIFICATE OF CORRECTION.

?atent No. 2,075,894 April 6, 1937.

HENRY M. GEBHARDT.

It is hereby certified that error appears in the printed specificationof the above numbered patent requiring correction as follows: Page 1,column 1, beginning with line 1, strike out all to and including line 8,in second column of said page and insert instead:

This invention relates to improvements in window ventilators and is moreparticularly directed to that type of ventilator which is adapted to beattached to a window to deflect the current of air passing therethroughand to prevent snow, rain and dust from entering the room whilepermitting of the passage of the current of air.

The chief objects of the present invention are the provision of aventilator that is strong, durable and inexpensive to manufacture andwhich is constructed and formed of a single piece of material and beingarranged in a flexible manner so as to be adjustable for windows towhich it is applied.

A further object is the provision of a window ventilator that extendsinwardly of the window and which has a bottom wall forming a drain forsleet, rain, etc., that may be carried therein while the ventilator isin use.

And a further object is the provision of a window ventilator that hasits side walls arranged to flex or yield so as to offer a yieldableresistance to the frame of the window to which it is applied forretaining the same in position therein, and whereby the side walls ofthe ventilator may be readily sprung for removing the same, and, when inposition, the window may be raised or lowered without the inconvenienceof removing the ventilator.

Referring to the drawing: I

Figure l is a plan sectional view taken through the window frame andlower sash, and illustrating my improved type of window ventilator inposition therein.

Figure 2 is a view of the blank of the ventilator illustrating in dottedlines the manner in which it is folded to produce a completedventilator.

Figure 5 illustrates a perspective view of the completed ventilatorformed from the blank shown in Figure 2.

Figure 4 is a partial detail sectional View taken on the line 4-4 ofFigure 3.

Figure 5 is a partial detail perspective view of the left hand portionof the ventilator shown in Figure '5, illustrating the ide wall thereofsprung inwardly to assume the position shown in Figure l whenattached toa window; and

Figure 6 is a partial detail sectional view taken on the line 6-6 ofFigure 5.

In constructing the ventilator, I prefer to provide a blank (Fig. 2)which is of relatively thin and strong sheet material having notched-outportions ll and 12 on one edge thereof and which is also notched at and14- at near each end thereof along the same edge. These notches form aguide along which the blank is folded vertically. The lower ends of theblank. are notched at 15 and 16 so that the blank 10 will assume theshape shown in Figure 2, and the side edges of the blank are eachprovided with a pair of relatively small sheared out portions 17 and1.8. The blank is then folded. vertically at the notches ll and 12 alongthe lines 19 and 20 to form a front wall 21 therebetween and side walls22 and 23. Then the side walls are formed outwardly on the notches l3and 14 along the lines 24 and 25 to form flanges 26 and 27.

When the device is folded along the lines 24-l9 and 20-25 aligned withthe notches 15-11 and l2l l, these folded portions form the side walls22 and 2-3,. respectively, the extreme portion outwardly of the lines 24and 25 form outwardly extending flanges 26 and 27.

The por ion extending between the notches l5 and 16 provides the bottomwall 28 and is fOlLGd along the line 29 so as to engage the inclinedlower edges 22a and 25a of the side walls 22 and 25, and at near theextreme edge, the bottom wall 28 is formed along the line 30 so as toform a depending edge 31 parallel with the outwardly extending flanges26 and 2'7 (Fig. 5) The ends of the bottom wall 28 are formed upwardlyon the lines 52 and 55 to provide upwardly extending side flanges E4l-55that converge from the line 50 to the lines 19 and 20, so as to form thebottom wall 28 of the same width as the front wall 21 and the formedportion 51 of the bottom wall that meets the flanges 26 and 27 beingrelatively wider so as to permit of a yieldable movement of the sidewalls 22 and 23 to permit them to be moved inwardly when the ventilatoris positioned in the window, as indicated in Figure l. The portionbetween the notches ll and is folded outwardly on the line 56 to providea top flange 37 along the front wall 2l of the ventilator, and theportions between the notches 11 and 15 and 12 and 14 are formed inwardlyalong the lines 38 and 59 to provide inwardly directed flanges 40 and 41on the side walls 22 and 23.

when thus formed, the blank 10 provides a complete ventilator that isthen adapted to be readily positioned in a window to be attached theretowithout the use of screws, nails or other fastening means. In order toattach the device, it is only necessary to open the window, spring theside walls 22 and 23 of the device inwardly to pass the side frame ofthe window and to then position the depending edge 31 along and flushwith the sill and the front wall of the ventilator directed toward theinside of the room, and to then release the side walls 22 and 23 topermit the outwardly extending flanges 26 and 27 thereof to engage thesides of the Window frame with their notches l7 and 18 forming grips toprevent the movement of the ventilator when so attached.

In order to exert a greater tension to the side walls 22 and 25 and toform stiffening means therefor, a pair of L-shaped members 42-42 areprovided which are preferably of spring material and which have one leg43 thereof secured to the front Wall 21 and their other legs 44 securedto the side walls 22 and 23, respectively.

When the ventilator is in position (Fig. l) the window frame 'A may beraised or lowered at will Without interfering With the ventilator or theventilator interfering with its movements, as the material is relativelythin and the space required for installing the same is merely thethickness of the outwardly extending flanges 26 and 27.

and that the said Letters Patent should be read with this correctiontherein that the same may conform to the record of the case in thePatent Office.

Signed and sealed this 20th day of July, A. D. 1957.

Henry Van Arsdale (Seal) Acting Commissioner of Patents.

